"Why is it okay to have two different (Or in one case 3 :/) Pokemon games sales combined into one game, but not combine the same games sales on two different platforms?"
Those were minor differences in essentially the same game. It's essentially why a film's box office includes the IMAX sales. But not DVD as that's a different medium.
A flashy-first game is awesome when it comes out. A great-first game is awesome forever.
Plus, just for the hell of it: Kelly Brook at the 2008 BAFTAs